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class="posts-expand"><article itemscope itemtype="http://schema.org/Article" class="post-block" lang="zh-CN"><link itemprop="mainEntityOfPage" href="http://www.zhengjiaao.cn/posts/1716140877.html"><span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"><meta itemprop="image" content="/my-images/avatar.gif"><meta itemprop="name" content="宇宙小神特别萌"><meta itemprop="description" content="人生就是一次幸运的旅行！"></span><span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"><meta itemprop="name" content="宇宙小神特别萌"></span><header class="post-header"><h1 class="post-title" itemprop="name headline">spring5x-hibernate5-cfg</h1><div class="post-meta"><span class="post-meta-item"><span class="post-meta-item-icon"><i class="fa fa-calendar-o"></i> </span><span class="post-meta-item-text">发表于</span> <time title="创建时间：2020-01-03 16:14:50" itemprop="dateCreated datePublished" datetime="2020-01-03T16:14:50+08:00">2020-01-03</time> </span><span class="post-meta-item"><span class="post-meta-item-icon"><i class="fa fa-calendar-check-o"></i> </span><span class="post-meta-item-text">更新于</span> <time title="修改时间：2020-07-20 18:37:55" itemprop="dateModified" datetime="2020-07-20T18:37:55+08:00">2020-07-20</time> </span><span id="/posts/1716140877.html" class="post-meta-item leancloud_visitors" data-flag-title="spring5x-hibernate5-cfg" title="热度"><span class="post-meta-item-icon"><i class="fa fa-eye"></i> </span><span class="post-meta-item-text">热度：</span> <span class="leancloud-visitors-count"></span> <span>℃</span> </span><span class="post-meta-item" title="热度" id="busuanzi_container_page_pv" style="display:none"><span class="post-meta-item-icon"><i class="fa fa-eye"></i> </span><span class="post-meta-item-text">热度：</span> <span id="busuanzi_value_page_pv"></span> </span><span class="post-meta-item"><span class="post-meta-item-icon"><i class="fa fa-comment-o"></i> </span><span class="post-meta-item-text">Valine：</span> <a title="valine" href="/posts/1716140877.html#comments" itemprop="discussionUrl"><span class="post-comments-count valine-comment-count" data-xid="/posts/1716140877.html" itemprop="commentCount"></span></a></span><br><span class="post-meta-item" title="本文字数"><span class="post-meta-item-icon"><i class="fa fa-file-word-o"></i> </span><span class="post-meta-item-text">本文字数：</span> <span>13k</span> </span><span class="post-meta-item" title="阅读时长"><span class="post-meta-item-icon"><i class="fa fa-clock-o"></i> </span><span class="post-meta-item-text">阅读时长 &asymp;</span> <span>11 分钟</span></span></div></header><div class="post-body" itemprop="articleBody"><meta name="referrer" content="no-referrer"><p>spring5x-hibernate5-cfg 此模块是从spring5x-hibernate5-base 基础模块扩展过来的<br>spring5x-hibernate5-base模块是一个hibernate5基础架构 ，可参考<a href>spring5x-hibernate5-base 基础模块</a></p><h2 id="搭建项目"><a href="#搭建项目" class="headerlink" title="搭建项目"></a>搭建项目</h2><p><strong>基于spring5x-hibernate5-base 基础模块 新增功能：</strong></p><ul><li>1、关联关系(如多对多/一对多等)</li><li>2、解决noSession和懒加载无限循环的几种方式</li></ul><a id="more"></a><h3 id="1、关联关系-如多对多-一对多等"><a href="#1、关联关系-如多对多-一对多等" class="headerlink" title="1、关联关系(如多对多/一对多等)"></a>1、关联关系(如多对多/一对多等)</h3><hr><p>manyToMany(多对多)<br>实体类</p><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 学生</span></span><br><span class="line"><span class="comment"> * Hibernate获取数据java.lang.StackOverflowError 原因：因为在重写toString()方法时 ，把关联的属性也放入到toString方法中了 ，去掉就可以了</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">Student</span> </span>&#123;</span><br><span class="line">	<span class="keyword">private</span> <span class="keyword">int</span> stuId;</span><br><span class="line">	<span class="keyword">private</span> String stuName;</span><br><span class="line">	<span class="comment">//老师集合</span></span><br><span class="line">	<span class="keyword">private</span> Set&lt;Teacher&gt; teachers;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="title">Student</span><span class="params">()</span> </span>&#123;</span><br><span class="line">	&#125;</span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">int</span> <span class="title">getStuId</span><span class="params">()</span> </span>&#123;</span><br><span class="line">		<span class="keyword">return</span> stuId;</span><br><span class="line">	&#125;</span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setStuId</span><span class="params">(<span class="keyword">int</span> stuId)</span> </span>&#123;</span><br><span class="line">		<span class="keyword">this</span>.stuId = stuId;</span><br><span class="line">	&#125;</span><br><span class="line">	<span class="function"><span class="keyword">public</span> String <span class="title">getStuName</span><span class="params">()</span> </span>&#123;</span><br><span class="line">		<span class="keyword">return</span> stuName;</span><br><span class="line">	&#125;</span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setStuName</span><span class="params">(String stuName)</span> </span>&#123;</span><br><span class="line">		<span class="keyword">this</span>.stuName = stuName;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="comment">//不序列化</span></span><br><span class="line">	<span class="meta">@JsonBackReference</span></span><br><span class="line">	<span class="function"><span class="keyword">public</span> Set&lt;Teacher&gt; <span class="title">getTeachers</span><span class="params">()</span> </span>&#123;</span><br><span class="line">		<span class="keyword">return</span> teachers;</span><br><span class="line">	&#125;</span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setTeachers</span><span class="params">(Set&lt;Teacher&gt; teachers)</span> </span>&#123;</span><br><span class="line">		<span class="keyword">this</span>.teachers = teachers;</span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 老师</span></span><br><span class="line"><span class="comment"> * Hibernate获取数据java.lang.StackOverflowError 原因：因为在重写toString()方法时 ，把关联的属性也放入到toString方法中了 ，去掉就可以了</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">Teacher</span></span>&#123;</span><br><span class="line">	<span class="keyword">private</span> <span class="keyword">int</span> teaId;</span><br><span class="line">	<span class="keyword">private</span> String teaName;</span><br><span class="line">	<span class="comment">// 学生集合</span></span><br><span class="line">	<span class="keyword">private</span> Set&lt;Student&gt; students;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="title">Teacher</span><span class="params">()</span> </span>&#123;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">int</span> <span class="title">getTeaId</span><span class="params">()</span> </span>&#123;</span><br><span class="line">		<span class="keyword">return</span> teaId;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setTeaId</span><span class="params">(<span class="keyword">int</span> teaId)</span> </span>&#123;</span><br><span class="line">		<span class="keyword">this</span>.teaId = teaId;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> String <span class="title">getTeaName</span><span class="params">()</span> </span>&#123;</span><br><span class="line">		<span class="keyword">return</span> teaName;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setTeaName</span><span class="params">(String teaName)</span> </span>&#123;</span><br><span class="line">		<span class="keyword">this</span>.teaName = teaName;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="meta">@JsonBackReference</span></span><br><span class="line">	<span class="function"><span class="keyword">public</span> Set&lt;Student&gt; <span class="title">getStudents</span><span class="params">()</span> </span>&#123;</span><br><span class="line">		<span class="keyword">return</span> students;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setStudents</span><span class="params">(Set&lt;Student&gt; students)</span> </span>&#123;</span><br><span class="line">		<span class="keyword">this</span>.students = students;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure><p>*.hbm.xml *与实体类名称相同</p><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">&lt;!--Student.hbm.xml--&gt;</span></span><br><span class="line"><span class="meta">&lt;?xml version='1.0' encoding='utf-8'?&gt;</span></span><br><span class="line"><span class="meta">&lt;!DOCTYPE <span class="meta-keyword">hibernate-mapping</span> <span class="meta-keyword">PUBLIC</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">"-//Hibernate/Hibernate Mapping DTD 3.0//EN"</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">" http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;<span class="name">hibernate-mapping</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">class</span> <span class="attr">name</span>=<span class="string">"com.zja.entity.manytoMany.Student"</span> <span class="attr">table</span>=<span class="string">"t_student"</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">id</span> <span class="attr">name</span>=<span class="string">"stuId"</span> <span class="attr">type</span>=<span class="string">"int"</span>&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">column</span> <span class="attr">name</span>=<span class="string">"stuId"</span> /&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">generator</span> <span class="attr">class</span>=<span class="string">"increment"</span> /&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">id</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"stuName"</span> <span class="attr">type</span>=<span class="string">"java.lang.String"</span>&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">column</span> <span class="attr">name</span>=<span class="string">"stuName"</span> /&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="comment">&lt;!-- 这里的table是指连接表的名称 --&gt;</span></span><br><span class="line">        <span class="comment">&lt;!--lazy:proxy(使用代理并延迟加载),no-proxy(不适用代理并延迟加载),false(立即加载)--&gt;</span></span><br><span class="line">        <span class="comment">&lt;!--inverse:false属性说明Student实体类是主控方 ，负责维护关系表。只有一方维护关系 ，否则会造成重复更新--&gt;</span></span><br><span class="line">        <span class="comment">&lt;!--cascade:指明级联操作的类型--&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">set</span> <span class="attr">name</span>=<span class="string">"teachers"</span> <span class="attr">table</span>=<span class="string">"t_stu_tea"</span> <span class="attr">cascade</span>=<span class="string">"save-update,delete"</span> <span class="attr">inverse</span>=<span class="string">"false"</span> <span class="attr">lazy</span>=<span class="string">"true"</span>&gt;</span></span><br><span class="line">            <span class="comment">&lt;!-- 这个是关联表的字段名 ，同时是Teacher的外键 --&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">key</span>&gt;</span></span><br><span class="line">                <span class="tag">&lt;<span class="name">column</span> <span class="attr">name</span>=<span class="string">"stuId"</span>/&gt;</span></span><br><span class="line">            <span class="tag">&lt;/<span class="name">key</span>&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">many-to-many</span> <span class="attr">class</span>=<span class="string">"com.zja.entity.manytoMany.Teacher"</span> <span class="attr">column</span>=<span class="string">"teaId"</span>/&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">set</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">class</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">hibernate-mapping</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">&lt;!--Teacher.hbm.xml--&gt;</span></span><br><span class="line"><span class="meta">&lt;?xml version='1.0' encoding='utf-8'?&gt;</span></span><br><span class="line"><span class="meta">&lt;!DOCTYPE <span class="meta-keyword">hibernate-mapping</span> <span class="meta-keyword">PUBLIC</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">"-//Hibernate/Hibernate Mapping DTD 3.0//EN"</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">" http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;<span class="name">hibernate-mapping</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">class</span> <span class="attr">name</span>=<span class="string">"com.zja.entity.manytoMany.Teacher"</span> <span class="attr">table</span>=<span class="string">"t_teacher"</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">id</span> <span class="attr">name</span>=<span class="string">"teaId"</span> <span class="attr">type</span>=<span class="string">"int"</span>&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">column</span> <span class="attr">name</span>=<span class="string">"teaId"</span> /&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">generator</span> <span class="attr">class</span>=<span class="string">"increment"</span> /&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">id</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"teaName"</span> <span class="attr">type</span>=<span class="string">"java.lang.String"</span>&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">column</span> <span class="attr">name</span>=<span class="string">"teaName"</span> /&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="comment">&lt;!-- 这里的table是指连接表(中间表)的名称 --&gt;</span></span><br><span class="line">        <span class="comment">&lt;!--lazy:proxy(使用代理并延迟加载),no-proxy(不适用代理并延迟加载),false(立即加载)--&gt;</span></span><br><span class="line">        <span class="comment">&lt;!--inverse:true属性说明Teacher实体类是被控方 ，不负责维护关系表。只有一方维护关系 ，否则会造成重复更新--&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">set</span> <span class="attr">name</span>=<span class="string">"students"</span> <span class="attr">table</span>=<span class="string">"t_stu_tea"</span> <span class="attr">cascade</span>=<span class="string">"save-update,delete"</span> <span class="attr">inverse</span>=<span class="string">"true"</span> <span class="attr">lazy</span>=<span class="string">"true"</span>&gt;</span></span><br><span class="line">            <span class="comment">&lt;!-- 这个是关联表的字段名 ，同时是Teacher的外键 --&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">key</span> <span class="attr">column</span>=<span class="string">"teaId"</span> /&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">many-to-many</span> <span class="attr">class</span>=<span class="string">"com.zja.entity.manytoMany.Student"</span> <span class="attr">column</span>=<span class="string">"stuId"</span>/&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">set</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">class</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">hibernate-mapping</span>&gt;</span></span><br></pre></td></tr></table></figure><p>oneToMany(一对多、多对一)</p><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * Date: 2019-11-27 14:19</span></span><br><span class="line"><span class="comment"> * Author: zhengja</span></span><br><span class="line"><span class="comment"> * Email: zhengja@dist.com.cn</span></span><br><span class="line"><span class="comment"> * Desc：关键点是通过部门实体类维护到员工的实体类</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@Getter</span></span><br><span class="line"><span class="meta">@Setter</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">Dept</span> </span>&#123;</span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">int</span> deptId;<span class="comment">// 部门编号</span></span><br><span class="line">    <span class="keyword">private</span> String deptName;<span class="comment">// 部门名称</span></span><br><span class="line"></span><br><span class="line">    <span class="comment">//@JSONField(serialize=false)  //被注解的字段不会被序列化</span></span><br><span class="line">    <span class="comment">//@JsonIgnore  //被注解的字段不会被序列化</span></span><br><span class="line">    <span class="meta">@JsonBackReference</span> <span class="comment">//在序列化时 ，@JsonBackReference的作用相当于@JsonIgnore</span></span><br><span class="line">    <span class="keyword">private</span> Set&lt;Employee&gt; emps;<span class="comment">// 部门对应多个员工 ，即一对多的关系</span></span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * Date: 2019-11-27 14:20</span></span><br><span class="line"><span class="comment"> * Author: zhengja</span></span><br><span class="line"><span class="comment"> * Email: zhengja@dist.com.cn</span></span><br><span class="line"><span class="comment"> * Desc：</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@Getter</span></span><br><span class="line"><span class="meta">@Setter</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">Employee</span> </span>&#123;</span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">int</span> empId;<span class="comment">// 员工的编号</span></span><br><span class="line">    <span class="keyword">private</span> String empName;<span class="comment">// 员工的名称</span></span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">double</span> salary;<span class="comment">// 员工的薪资</span></span><br><span class="line"></span><br><span class="line">    <span class="comment">//@JSONField(serialize=false)  //被注解的字段不会被序列化</span></span><br><span class="line">    <span class="comment">//@JsonIgnore //被注解的字段不会被序列化</span></span><br><span class="line">    <span class="meta">@JsonBackReference</span> <span class="comment">//尽量放到get方法上 ，在序列化时 ，@JsonBackReference的作用相当于@JsonIgnore</span></span><br><span class="line">    <span class="keyword">private</span> Dept dept;<span class="comment">// 员工和部门的关系</span></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure><p>*.hbm.xml *与实体类名称相同</p><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">&lt;!--Dept.hbm.xml--&gt;</span></span><br><span class="line"><span class="meta">&lt;?xml version="1.0"?&gt;</span></span><br><span class="line"><span class="meta">&lt;!DOCTYPE <span class="meta-keyword">hibernate-mapping</span> <span class="meta-keyword">PUBLIC</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">"-//Hibernate/Hibernate Mapping DTD 3.0//EN"</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">" http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;<span class="name">hibernate-mapping</span> <span class="attr">package</span>=<span class="string">"com.zja.entity.oneToMany"</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">class</span> <span class="attr">name</span>=<span class="string">"Dept"</span> <span class="attr">table</span>=<span class="string">"t_dept"</span>&gt;</span></span><br><span class="line">        <span class="comment">&lt;!-- 第一写主键映射 --&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">id</span> <span class="attr">name</span>=<span class="string">"deptId"</span> <span class="attr">column</span>=<span class="string">"deptId"</span>&gt;</span></span><br><span class="line">            <span class="comment">&lt;!--在内存中生成主键 ，不依赖于底层的数据库 ，因此可以跨数据库,首次从数据库取主键最大的值--&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">generator</span> <span class="attr">class</span>=<span class="string">"increment"</span> /&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">id</span>&gt;</span></span><br><span class="line">        <span class="comment">&lt;!-- 第二写其他字段映射 --&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"deptName"</span> <span class="attr">column</span>=<span class="string">"deptName"</span></span></span><br><span class="line"><span class="tag">                  <span class="attr">length</span>=<span class="string">"20"</span>	<span class="attr">type</span>=<span class="string">"string"</span> /&gt;</span></span><br><span class="line">        <span class="comment">&lt;!--</span></span><br><span class="line"><span class="comment">            第三写其他映射 ，比如这里的set集合映射 ，set集合映射主要有以下几点：</span></span><br><span class="line"><span class="comment">                1 实体类申明的集合属性属性（name）</span></span><br><span class="line"><span class="comment">                2 集合属性对应的表（table）</span></span><br><span class="line"><span class="comment">                3 指定集合表的外键字段名称（key中的column）</span></span><br><span class="line"><span class="comment">                4 集合对象对应的实体类（noe-to-many中的class）</span></span><br><span class="line"><span class="comment">        --&gt;</span></span><br><span class="line">        <span class="comment">&lt;!--一对多(一个部门对应多个员工)--&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">set</span> <span class="attr">name</span>=<span class="string">"emps"</span> <span class="attr">table</span>=<span class="string">"t_employee"</span>&gt;</span></span><br><span class="line">            <span class="comment">&lt;!--column指定了员工表的外键字段名称 --&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">key</span> <span class="attr">column</span>=<span class="string">"deptId"</span>/&gt;</span></span><br><span class="line">            <span class="comment">&lt;!-- class由于上面已经写了包名 ，这里直接使用即可 --&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">one-to-many</span> <span class="attr">class</span>=<span class="string">"Employee"</span> /&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">set</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">class</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">hibernate-mapping</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">&lt;!--Employee.hbm.xml--&gt;</span></span><br><span class="line"><span class="meta">&lt;?xml version="1.0"?&gt;</span></span><br><span class="line"><span class="meta">&lt;!DOCTYPE <span class="meta-keyword">hibernate-mapping</span> <span class="meta-keyword">PUBLIC</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">"-//Hibernate/Hibernate Mapping DTD 3.0//EN"</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">" http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;<span class="name">hibernate-mapping</span> <span class="attr">package</span>=<span class="string">"com.zja.entity.oneToMany"</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">class</span> <span class="attr">name</span>=<span class="string">"Employee"</span> <span class="attr">table</span>=<span class="string">"employee"</span>&gt;</span></span><br><span class="line">        <span class="comment">&lt;!-- 主键映射 --&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">id</span> <span class="attr">name</span>=<span class="string">"empId"</span> <span class="attr">column</span>=<span class="string">"empId"</span>&gt;</span></span><br><span class="line">            <span class="comment">&lt;!--在内存中生成主键 ，不依赖于底层的数据库 ，因此可以跨数据库,首次从数据库取主键最大的值--&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">generator</span> <span class="attr">class</span>=<span class="string">"increment"</span> /&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">id</span>&gt;</span></span><br><span class="line">        <span class="comment">&lt;!-- 其他字段映射 --&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"empName"</span> <span class="attr">column</span>=<span class="string">"empName"</span> <span class="attr">length</span>=<span class="string">"20"</span> <span class="attr">type</span>=<span class="string">"string"</span>/&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"salary"</span> <span class="attr">column</span>=<span class="string">"salary"</span> <span class="attr">type</span>=<span class="string">"double"</span>/&gt;</span></span><br><span class="line">        <span class="comment">&lt;!--</span></span><br><span class="line"><span class="comment">            多对一的映射配置：多个员工对应一个部门</span></span><br><span class="line"><span class="comment">            name是实体类中申明的属性；</span></span><br><span class="line"><span class="comment">            column外键字段名称 ，对应多的一方的数据库表中的外键字段名；</span></span><br><span class="line"><span class="comment">            class对应的部门实体类；</span></span><br><span class="line"><span class="comment">        --&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">many-to-one</span> <span class="attr">name</span>=<span class="string">"dept"</span> <span class="attr">column</span>=<span class="string">"deptId"</span> <span class="attr">class</span>=<span class="string">"Dept"</span>/&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">class</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;/<span class="name">hibernate-mapping</span>&gt;</span></span><br></pre></td></tr></table></figure><p>oneToOne(基于外键：一对一)</p><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 档案实体 resume:user 基于外键的一对一 [多对一 (unique=true)]</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@Getter</span></span><br><span class="line"><span class="meta">@Setter</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">Resume</span> </span>&#123;</span><br><span class="line">	</span><br><span class="line">	<span class="keyword">private</span> <span class="keyword">int</span> resId;</span><br><span class="line">	<span class="keyword">private</span> String resName;</span><br><span class="line"></span><br><span class="line">	<span class="comment">//用户</span></span><br><span class="line">	<span class="keyword">private</span> UserOne user;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 用户实体 用户对档案 基于外键的一对一</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@Getter</span></span><br><span class="line"><span class="meta">@Setter</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">UserOne</span> </span>&#123;</span><br><span class="line">	</span><br><span class="line">	<span class="keyword">private</span> <span class="keyword">int</span> userId;</span><br><span class="line">	<span class="keyword">private</span> String userName;</span><br><span class="line"></span><br><span class="line">	<span class="comment">//档案</span></span><br><span class="line">	<span class="keyword">private</span> Resume resume;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure><p>*.hbm.xml *与实体类名称相同</p><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">&lt;!--Resume.hbm.xml--&gt;</span></span><br><span class="line"><span class="meta">&lt;?xml version='1.0' encoding='utf-8'?&gt;</span></span><br><span class="line"><span class="meta">&lt;!DOCTYPE <span class="meta-keyword">hibernate-mapping</span> <span class="meta-keyword">PUBLIC</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">"-//Hibernate/Hibernate Mapping DTD 3.0//EN"</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">" http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"</span>&gt;</span></span><br><span class="line"><span class="comment">&lt;!-- 基于外键的一对一  ，和主键关联的区别是：主键策略正常配置 ，one-to-one改为many-to-one,</span></span><br><span class="line"><span class="comment">     注意保存顺序 ，先保存主的一方（用户） ，可以减少update--&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">hibernate-mapping</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">class</span> <span class="attr">name</span>=<span class="string">"com.zja.entity.oneToOne.Resume"</span> <span class="attr">table</span>=<span class="string">"RESUME"</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">id</span> <span class="attr">name</span>=<span class="string">"resId"</span> <span class="attr">column</span>=<span class="string">"RESID"</span> <span class="attr">type</span>=<span class="string">"int"</span>&gt;</span></span><br><span class="line">            <span class="comment">&lt;!--在内存中生成主键 ，不依赖于底层的数据库 ，因此可以跨数据库,首次从数据库取主键最大的值--&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">generator</span> <span class="attr">class</span>=<span class="string">"increment"</span>/&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">id</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"resName"</span> <span class="attr">column</span>=<span class="string">"RESNAME"</span> <span class="attr">type</span>=<span class="string">"java.lang.String"</span>/&gt;</span></span><br><span class="line"></span><br><span class="line">        <span class="comment">&lt;!--多对一：档案对用户</span></span><br><span class="line"><span class="comment">        	一对一配置 ，name是实体类UserOne的属性</span></span><br><span class="line"><span class="comment">        	column是数据库外键字段名</span></span><br><span class="line"><span class="comment">        	由于是多对一的特例 ，所以需要加unique属性</span></span><br><span class="line"><span class="comment">        --&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">many-to-one</span> <span class="attr">name</span>=<span class="string">"user"</span> <span class="attr">class</span>=<span class="string">"com.zja.entity.oneToOne.UserOne"</span> <span class="attr">cascade</span>=<span class="string">"all"</span>&gt;</span></span><br><span class="line">        <span class="comment">&lt;!-- 指定列不能重复 --&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">column</span> <span class="attr">name</span>=<span class="string">"user_id"</span> <span class="attr">unique</span>=<span class="string">"true"</span>/&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">many-to-one</span>&gt;</span></span><br><span class="line"></span><br><span class="line">    <span class="tag">&lt;/<span class="name">class</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">hibernate-mapping</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">&lt;!--UserOne.hbm.xml--&gt;</span></span><br><span class="line"><span class="meta">&lt;?xml version='1.0' encoding='utf-8'?&gt;</span></span><br><span class="line"><span class="meta">&lt;!DOCTYPE <span class="meta-keyword">hibernate-mapping</span> <span class="meta-keyword">PUBLIC</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">"-//Hibernate/Hibernate Mapping DTD 3.0//EN"</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">" http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"</span>&gt;</span></span><br><span class="line"><span class="comment">&lt;!-- 基于外键的一对一  ，和主键关联的区别是：新增property-ref属性 ，</span></span><br><span class="line"><span class="comment">     如果没有指定此属性会使用对方关联类的主键来跟本类的主键比较 ，这里要注意不是关联表中的外键字段名 ，是对象属性--&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">hibernate-mapping</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">class</span> <span class="attr">name</span>=<span class="string">"com.zja.entity.oneToOne.UserOne"</span> <span class="attr">table</span>=<span class="string">"USERONE"</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">id</span> <span class="attr">name</span>=<span class="string">"userId"</span> <span class="attr">column</span>=<span class="string">"USERID"</span> <span class="attr">type</span>=<span class="string">"int"</span>&gt;</span></span><br><span class="line">            <span class="comment">&lt;!--在内存中生成主键 ，不依赖于底层的数据库 ，因此可以跨数据库,首次从数据库取主键最大的值--&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">generator</span> <span class="attr">class</span>=<span class="string">"increment"</span>/&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">id</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"userName"</span> <span class="attr">column</span>=<span class="string">"USERNAME"</span> <span class="attr">type</span>=<span class="string">"java.lang.String"</span>/&gt;</span></span><br><span class="line"></span><br><span class="line">        <span class="comment">&lt;!--</span></span><br><span class="line"><span class="comment">           name:是实体类中引入的属性名</span></span><br><span class="line"><span class="comment">           property-ref:指定关联类的属性名(档案所属的学生) ，</span></span><br><span class="line"><span class="comment">           这个属性将会和本类的主键相对应</span></span><br><span class="line"><span class="comment">       --&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">one-to-one</span> <span class="attr">name</span>=<span class="string">"resume"</span> <span class="attr">class</span>=<span class="string">"com.zja.entity.oneToOne.Resume"</span> <span class="attr">property-ref</span>=<span class="string">"user"</span>/&gt;</span></span><br><span class="line"></span><br><span class="line">    <span class="tag">&lt;/<span class="name">class</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">hibernate-mapping</span>&gt;</span></span><br></pre></td></tr></table></figure><p>oneToOnePK(基于主键：一对一)</p><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 档案实体  resume:user 基于主键的一对一</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@Getter</span></span><br><span class="line"><span class="meta">@Setter</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">ResumePk</span> </span>&#123;</span><br><span class="line">	</span><br><span class="line">	<span class="keyword">private</span> <span class="keyword">int</span> resId;</span><br><span class="line">	<span class="keyword">private</span> String resName;</span><br><span class="line"></span><br><span class="line">	<span class="comment">//用户</span></span><br><span class="line">	<span class="meta">@JsonBackReference</span></span><br><span class="line">	<span class="keyword">private</span> UserPk user;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 用户实体  UserPk:ResumePk 基于主键的一对一</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@Getter</span></span><br><span class="line"><span class="meta">@Setter</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">UserPk</span> </span>&#123;</span><br><span class="line">	</span><br><span class="line">	<span class="keyword">private</span> <span class="keyword">int</span> userId;</span><br><span class="line">	<span class="keyword">private</span> String userName;</span><br><span class="line"></span><br><span class="line">	<span class="comment">//档案</span></span><br><span class="line">	<span class="meta">@JsonBackReference</span></span><br><span class="line">	<span class="keyword">private</span> ResumePk resume;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure><p>*.hbm.xml *与实体类名称相同</p><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">&lt;!--ResumePk.hbm.xml--&gt;</span></span><br><span class="line"><span class="meta">&lt;?xml version='1.0' encoding='utf-8'?&gt;</span></span><br><span class="line"><span class="meta">&lt;!DOCTYPE <span class="meta-keyword">hibernate-mapping</span> <span class="meta-keyword">PUBLIC</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">"-//Hibernate/Hibernate Mapping DTD 3.0//EN"</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">" http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"</span>&gt;</span></span><br><span class="line"><span class="comment">&lt;!--基于主键的一对一--&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">hibernate-mapping</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">class</span> <span class="attr">name</span>=<span class="string">"com.zja.entity.oneToOnePk.ResumePk"</span> <span class="attr">table</span>=<span class="string">"pk_resume"</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">id</span> <span class="attr">name</span>=<span class="string">"resId"</span> <span class="attr">column</span>=<span class="string">"RESID"</span> <span class="attr">type</span>=<span class="string">"int"</span>&gt;</span></span><br><span class="line">            <span class="comment">&lt;!-- 档案表是外键 generator --&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">generator</span> <span class="attr">class</span>=<span class="string">"foreign"</span>&gt;</span></span><br><span class="line">            <span class="comment">&lt;!-- 引用one-to-one 关联属性名称 --&gt;</span></span><br><span class="line">            <span class="comment">&lt;!-- 重点在这里 ，因为主键跟外键是同一个 ，直接在此申明该主键就是外键 --&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">param</span> <span class="attr">name</span>=<span class="string">"property"</span>&gt;</span>user<span class="tag">&lt;/<span class="name">param</span>&gt;</span></span><br><span class="line">            <span class="tag">&lt;/<span class="name">generator</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">id</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"resName"</span> <span class="attr">column</span>=<span class="string">"RESNAME"</span> <span class="attr">type</span>=<span class="string">"java.lang.String"</span>/&gt;</span></span><br><span class="line"></span><br><span class="line">        <span class="comment">&lt;!--</span></span><br><span class="line"><span class="comment">        1、constrained只能在one-to-one的映射中使用 ，（一般在主表的映射中 ，有外键的那个表）。</span></span><br><span class="line"><span class="comment">        如果constrained=true ， 则表明存在外键与关联表对应 ，并且关联表中肯定存在对应的键与其对应 ，</span></span><br><span class="line"><span class="comment">        另外该选项最关键的是影响save和delete的先后顺序。例如增加的时候 ，如果constainted=true,则会先增加关联表 ，然后增加本表。删除的时候反之。</span></span><br><span class="line"><span class="comment">        2、one-to- one的双向关联中 ，必须设置constrained=true ，要不然会有重复数据读。</span></span><br><span class="line"><span class="comment">        3、one-to-one的单向关联中 ，如果constrained=false ，则会在查询时就全部取出来 ，用left outer join的方式。</span></span><br><span class="line"><span class="comment">        如果constrained=true ，hibernate即会延迟加载sql ，只把主表的查出来 ，等有用到关联表的再发sql取。--&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">one-to-one</span> <span class="attr">name</span>=<span class="string">"user"</span> <span class="attr">class</span>=<span class="string">"com.zja.entity.oneToOnePk.UserPk"</span> <span class="attr">constrained</span>=<span class="string">"true"</span>/&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">class</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">hibernate-mapping</span>&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">&lt;!--UserPk.hbm.xml--&gt;</span></span><br><span class="line"><span class="meta">&lt;?xml version='1.0' encoding='utf-8'?&gt;</span></span><br><span class="line"><span class="meta">&lt;!DOCTYPE <span class="meta-keyword">hibernate-mapping</span> <span class="meta-keyword">PUBLIC</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">"-//Hibernate/Hibernate Mapping DTD 3.0//EN"</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">" http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"</span>&gt;</span></span><br><span class="line"><span class="comment">&lt;!--基于主键的一对一--&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">hibernate-mapping</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">class</span> <span class="attr">name</span>=<span class="string">"com.zja.entity.oneToOnePk.UserPk"</span> <span class="attr">table</span>=<span class="string">"pk_user"</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">id</span> <span class="attr">name</span>=<span class="string">"userId"</span> <span class="attr">column</span>=<span class="string">"USERID"</span> <span class="attr">type</span>=<span class="string">"int"</span>&gt;</span></span><br><span class="line">            <span class="comment">&lt;!--在内存中生成主键 ，不依赖于底层的数据库 ，因此可以跨数据库,首次从数据库取主键最大的值--&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">generator</span> <span class="attr">class</span>=<span class="string">"increment"</span>/&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">id</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"userName"</span> <span class="attr">column</span>=<span class="string">"USERNAME"</span> <span class="attr">type</span>=<span class="string">"java.lang.String"</span>/&gt;</span></span><br><span class="line"></span><br><span class="line">        <span class="tag">&lt;<span class="name">one-to-one</span> <span class="attr">name</span>=<span class="string">"resume"</span> <span class="attr">class</span>=<span class="string">"com.zja.entity.oneToOnePk.ResumePk"</span> <span class="attr">cascade</span>=<span class="string">"all"</span>/&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">class</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">hibernate-mapping</span>&gt;</span></span><br></pre></td></tr></table></figure><p>sinceMapping(自关联：多对一、一对多)</p><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * Date: 2019-11-25 13:24</span></span><br><span class="line"><span class="comment"> * Author: zhengja</span></span><br><span class="line"><span class="comment"> * Email: zhengja@dist.com.cn</span></span><br><span class="line"><span class="comment"> * Desc：Hibernate5 映射之自身关联</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@Data</span></span><br><span class="line"><span class="meta">@NoArgsConstructor</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">Menu</span> <span class="keyword">implements</span> <span class="title">Serializable</span> </span>&#123;</span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">int</span> menuId;</span><br><span class="line">    <span class="keyword">private</span> String menuName;</span><br><span class="line">    <span class="comment">// 菜单和子菜单是一对多 ，子引入父类对象</span></span><br><span class="line">    <span class="keyword">private</span> Menu parentMenu;</span><br><span class="line">    <span class="comment">// 这里引入子类对象集合</span></span><br><span class="line">    <span class="keyword">private</span> Set&lt;Menu&gt; childMenus = <span class="keyword">new</span> HashSet&lt;&gt;();</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure><p>*.hbm.xml *与实体类名称相同</p><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">&lt;!--Menu.hbm.xml--&gt;</span></span><br><span class="line"><span class="meta">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span></span><br><span class="line"><span class="meta">&lt;!DOCTYPE <span class="meta-keyword">hibernate-mapping</span> <span class="meta-keyword">PUBLIC</span> <span class="meta-string">"-//Hibernate/Hibernate Mapping DTD 3.0//EN"</span></span></span><br><span class="line"><span class="meta">        <span class="meta-string">" http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"</span>&gt;</span></span><br><span class="line"><span class="comment">&lt;!-- Generated 2018-7-31 16:16:18 by Hibernate Tools 3.5.0.Final --&gt;</span></span><br><span class="line"><span class="comment">&lt;!--package解决每个实体类都要写全路径--&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">hibernate-mapping</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">class</span> <span class="attr">name</span>=<span class="string">"com.zja.entity.sinceMapping.Menu"</span> <span class="attr">table</span>=<span class="string">"t_menu"</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">id</span> <span class="attr">name</span>=<span class="string">"menuId"</span> <span class="attr">column</span>=<span class="string">"menuId"</span> <span class="attr">type</span>=<span class="string">"int"</span>&gt;</span></span><br><span class="line">            <span class="comment">&lt;!--在内存中生成主键 ，不依赖于底层的数据库 ，因此可以跨数据库,首次从数据库取主键最大的值--&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">generator</span> <span class="attr">class</span>=<span class="string">"increment"</span> /&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">id</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"menuName"</span> <span class="attr">type</span>=<span class="string">"java.lang.String"</span>&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">column</span> <span class="attr">name</span>=<span class="string">"menuName"</span> /&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line"></span><br><span class="line">        <span class="comment">&lt;!--###注意：自关联查询 ，不能同时开启一对多和多对一 ，会发生死循环###--&gt;</span></span><br><span class="line"></span><br><span class="line">        <span class="comment">&lt;!--多对一--&gt;</span></span><br><span class="line">        <span class="comment">&lt;!--表中会生成parentId字段;lazy:proxy(使用代理并延迟加载),no-proxy(不适用代理并延迟加载),false(立即加载)--&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">many-to-one</span> <span class="attr">name</span>=<span class="string">"parentMenu"</span> <span class="attr">class</span>=<span class="string">"com.zja.entity.sinceMapping.Menu"</span> <span class="attr">column</span>=<span class="string">"parentId"</span> <span class="attr">lazy</span>=<span class="string">"false"</span>/&gt;</span></span><br><span class="line">        <span class="comment">&lt;!--一对多--&gt;</span></span><br><span class="line">        <span class="comment">&lt;!--&lt;set name="childMenus" cascade="all" lazy="false"&gt;</span></span><br><span class="line"><span class="comment">            &lt;key column="parentId" /&gt;</span></span><br><span class="line"><span class="comment">            &lt;one-to-many class="com.zja.entity.sinceMapping.Menu"/&gt;</span></span><br><span class="line"><span class="comment">        &lt;/set&gt;--&gt;</span></span><br><span class="line"></span><br><span class="line">    <span class="tag">&lt;/<span class="name">class</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">hibernate-mapping</span>&gt;</span></span><br></pre></td></tr></table></figure><h3 id="2、解决noSession和懒加载无限循环的几种方式"><a href="#2、解决noSession和懒加载无限循环的几种方式" class="headerlink" title="2、解决noSession和懒加载无限循环的几种方式"></a>2、解决noSession和懒加载无限循环的几种方式</h3><ul><li><a href="https://www.jianshu.com/p/ecfb11509a46" target="_blank" rel="noopener">https://www.jianshu.com/p/ecfb11509a46</a></li></ul><h2 id="具体实现操作代码参考-github-地址："><a href="#具体实现操作代码参考-github-地址：" class="headerlink" title="具体实现操作代码参考 github 地址："></a>具体实现操作代码参考 github 地址：</h2><ul><li><a href="https://links.jianshu.com/go?to=https%3A%2F%2Fgithub.com%2Fzhengjiaao%2Fspring5x" target="_blank" rel="noopener">https://github.com/zhengjiaao/spring5x</a></li></ul><h2 id="博客地址"><a href="#博客地址" class="headerlink" title="博客地址:"></a>博客地址:</h2><ul><li>简书：<a href="https://www.jianshu.com/u/70d69269bd09" target="_blank" rel="noopener">https://www.jianshu.com/u/70d69269bd09</a></li><li>掘金：<a href="https://juejin.im/user/5d82daeef265da03ad14881b/posts" target="_blank" rel="noopener">https://juejin.im/user/5d82daeef265da03ad14881b/posts</a></li></ul></div><div class="popular-posts-header"><p style="font-size:18px;color:red;margin:0 0 5px 0">相关文章推荐：</p></div><ul class="popular-posts"><li class="popular-posts-item"><div class="popular-posts-title"><a 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